After the wedding of Cana Jesus travels to Jerusalem for the feast of the Passover. Besides cleansing the temple of those who had made it a house of merchandise He also performed more miracles and revealed Himself as the Son of God..
Having heard and seen these things Nicodemus, a Pharisee, came to visit Jesus by night. Jesus taught him the most important lesson; “Except a man be born again, he cannot see the kingdom of God.” Nicodemus had to learn that it is the work of a triune God to save sinners.
That same lesson still comes to us. We must be born again!